Dr. Kirk Cantor is Professor of Plastics and Polymer Engineering Technology at Pennsylvania College of Technology, USA, where he has been since 1990. Prior to joining the faculty at Penn College, he was an aerospace engineer at NASA where he worked with polyethylene film for high altitude scientific balloons. Kirk received his Bachelor of Science in Aerospace Engineering from the University of Maryland and his Master of Science and PhD in Polymer Science from The Pennsylvania State University. His primary area of interest is polymer extrusion and he is the author of “Blown Film Extrusion,” now in its 3rd edition from Hanser Publishers.